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* [Bug target/25295] unused register saved in function prolog
[not found] <bug-25295-4@http.gcc.gnu.org/bugzilla/>
@ 2012-01-11 15:07 ` rguenth at gcc dot gnu.org
0 siblings, 0 replies; 3+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-01-11 15:07 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25295
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |FIXED
--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-11 15:07:00 UTC ---
No longer happens with 4.7.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/25295] unused register saved in function prolog
2005-12-07 15:09 [Bug middle-end/25295] New: " bcrl at kvack dot org
2005-12-12 20:46 ` [Bug target/25295] " pinskia at gcc dot gnu dot org
@ 2006-12-04 23:21 ` michael dot meissner at amd dot com
1 sibling, 0 replies; 3+ messages in thread
From: michael dot meissner at amd dot com @ 2006-12-04 23:21 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from michael dot meissner at amd dot com 2006-12-04 23:21 -------
I've done some analysis on the test case. The current GCC 4.2 and mainline
branches no longer generate the initial push of %r8, but instead do a subq
$8,%rsp. I believe in the compiler you used it did the push to allocate 8
bytes of stack instead of the subtract. Note, the epilogue still uses a pop to
remove the stack location. The core of the problem is that the compiler is
allocating 8 bytes too much stack in this particular case. I think I
understand whats going on, but I want to dig a bit more.
--
michael dot meissner at amd dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |michael dot meissner at amd
| |dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25295
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/25295] unused register saved in function prolog
2005-12-07 15:09 [Bug middle-end/25295] New: " bcrl at kvack dot org
@ 2005-12-12 20:46 ` pinskia at gcc dot gnu dot org
2006-12-04 23:21 ` michael dot meissner at amd dot com
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-12-12 20:46 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from pinskia at gcc dot gnu dot org 2005-12-12 20:46 -------
It comes after splitting a RTL pattern.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25295
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2012-01-11 15:07 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <bug-25295-4@http.gcc.gnu.org/bugzilla/>
2012-01-11 15:07 ` [Bug target/25295] unused register saved in function prolog rguenth at gcc dot gnu.org
2005-12-07 15:09 [Bug middle-end/25295] New: " bcrl at kvack dot org
2005-12-12 20:46 ` [Bug target/25295] " pinskia at gcc dot gnu dot org
2006-12-04 23:21 ` michael dot meissner at amd dot com
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